# Copyright (c) 2008-2009, samurai-x.org
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#
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#       notice, this list of conditions and the following disclaimer.
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#       names of its contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
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# TODO: rename `ooxcb.types`, so we can do `from types import FunctionType` here
def _f():
    pass

FunctionType = type(_f)
del _f

class cached_property(object):
    """
        A simple cached property descriptor.
        from http://ronny.uberhost.de/simple-cached-for-properties-done-right
    """
    def __init__(self, func):
        self.func = func
        self.name = func.__name__

    def __get__(self, obj, type=None):
        if obj is None:
            return self

        result = self.func(obj)
        setattr(obj, self.name, result)
        return result

def mixin_class(cls, into):
    """
        Add all methods of *cls* to the class *into*.

        :todo: We could also use something like `cls.__bases__ += (into,)`.
    """
    for name, member in vars(cls).iteritems():
        try:
            if isinstance(member, FunctionType):
                setattr(into, name, member)
        except TypeError:
            continue

def mixin_functions(functions, into):
    """
        Add all functions in *functions* to the class *into*.
    """
    for function in functions:
        setattr(into, function.__name__, function)

